HDTV Antenna

HDTV Antenna & How to Use It

An antenna, whether it be a regular one or that which they call as the high definition television antenna, is a bit of metal that is designed to vibrate at a frequency that is specific as well as be sensitive over a frequencies set at a range.  They are made to work in the Very High Frequencies (VHF) or Ultra High Frequencies (UHF) ranges or both.  An antenna picks up any antenna bandwidth transmitted by any station and transfers it to the television set.  A signal's content and its modulation define an antenna's being high definition making it a high definition television (HDTV) antenna.

While most people prefer to use indoor antennas because they find it easier to install, there are great advantages to using an outdoor antenna.  It gets you better signal for better quality viewing of the channels that you like to patronize.

Before mounting an outdoor HDTV antenna though, it is best to start out first by making a plan on how to do the proper installation.  There is no sense in going up to the roof or in your attic without knowing first what is best to be done to get the highest quality in getting the best frequency signals.  Before going up to that roof, you have to asses first on which direction and angle the antenna should face and which proper spot should it be installed.

Outdoor antennas could usually be installed on the roof of your house or just in the attic.  The advantage of putting that outdoor antenna inside the attic is you don't have to subject yourself to the danger of being in such a precarious balance as being on the roof.  The downside to this is you won't be getting the same quality of signal that you could get when the antenna is installed on the roof. 

Antenna installed in the attic could be disturbed by home appliances that run through electricity as well as cables that are located nearby and of course, materials for roofs.  Roofing made of metal aggravates the problem because it could completely destroy the signal.  As a metal shield cannot be penetrated by radio waves, it cannot be received by an attic-installed antenna.  Because of this, mounting your antenna on the roof top of your home is highly and strongly recommended.

Just make sure that before using that ladder and climbing on it to go to your roof to start mounting, safety measures have already been taken especially with regards to the installation and maintenance of an outdoor antenna.  Be safe always and see that the weather conditions is befitting the activity that you are about to undertake.  Being on a wet roof or ladder pose a very high risk of slippage.  To avoid hazards from electric shock, never attempt to go near electrical power lines in putting up your antenna.

If the kind of antenna that you purchased is omni-directional, there is no need to find the right direction to which your antenna should be aimed.  This is necessary for outdoor HDTV antennas that are directional, though.  These kind of antennas should be pointed at the right direction for it to give you the best signal.  First, you have to figure out on which direction your HDTV antenna is pointed towards.  Most antennas' directing elements gets radio waves that are coming towards it.  Directors of antennas should be aimed to the towers that provide the signals.  You have to find the towers' direction from where you are so that you can set up your antenna according to this direction.  You could check out AntennaWeb to get your areas' broadcasts as well compass orientation that could direct you to the towers that transmits the signals.

Setting up an antenna is also dependent on putting it on a spot that is ideal for an outdoor HDTV antenna.  The perfect spot for the installation of such a device is that where the line of sight between the transmitting towers and the antenna has no obstructions.  Although finding this spot could be very rare, you could at least make sure that your antenna is pointed away from the house of your neighbor or a nearby tree.  A UHF band signal could be blocked by just a tree and cause reasonable attenuation on the signal of the VHF band.

If you really want to get a better signal from your outdoor antenna, then it is most advisable to set up at a higher place.  This is so because obstructions, whatever they may be present potential signal blockage.  This could cause the certain stations' reception to be prevented and images that are low in quality could be produced as well.  Placing your outdoor antenna on the highest possible point on your roof gets rid of such problems.

Also take great care in avoiding the presence of metal on your own roof 's parts or that of the roofs of your neighbor's houses in the installation of your antenna.  Any object with metallic properties that is found at less than a distance of a wavelength is already close enough to be a part of your outdoor HDTV antenna.  This alters the electrical properties of your antenna such as its directivity, bandwidth and resonance frequency.  The acceptable distance between your antenna and metallic objects should depend on the frequency.  On the UHF band, a three feet separation distance is already enough but an estimated 5-8 times more than this is needed on the VHF band, which is lower.

Cables for outdoor television antennas should be very short.  Energy of a radio signal is dispersed while it is running along a cable making the loss of signal energy more before the TV set is reached when a longer cable is used.  Once the antenna has been properly mounted, bear in mind to reduce the length of cables running into your home from your antenna.  Cutting back on these cables will also help you avoid outages that may be caused by anything that got snagged on the excess length or by the cables being blown by the wind out of the antenna.